oneplus phone struck to vibration mode

[ranjan patnaik]

unable to revive to sound mode from vibration mode

 

[B. Diddy]

Welcome to Android Central! Does it come back if you boot into Safe Mode? https://www.t-mobile.com/support/devices/android/oneplus-6t/safe-mode-oneplus-6t

 

[mustang7757]

Which one plus phone?
You move the slider button and it doesn't make any difference?

 

[Javier P]

Welcome to the forums. The alert slider can accumulate a lot of dirt inside, this is a very common issue. Use a toothpick or a needle and carefully try to clean it. Tell us how it goes.